CN111854597A - Method, device and system for detecting relative rotation between components - Google Patents
Method, device and system for detecting relative rotation between components Download PDFInfo
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- CN111854597A CN111854597A CN202010474836.0A CN202010474836A CN111854597A CN 111854597 A CN111854597 A CN 111854597A CN 202010474836 A CN202010474836 A CN 202010474836A CN 111854597 A CN111854597 A CN 111854597A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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Abstract
The invention discloses a method, a device and a system for detecting relative rotation between components. The method for detecting relative rotation between components comprises the following steps: the label detects the on-off of at least one detection circuit connected with the label; determining that relative rotation between the components has occurred when the tag detects that the at least one detection circuit is open; the detection circuit and the tag form at least one closed loop that is opened upon relative rotation between the components. The invention can automatically identify the relative rotation between the components. Moreover, even a slight relative rotation between the members can be easily detected, and therefore the sensitivity of detecting the relative rotation between the members is greatly improved. In addition, the present invention can also detect the range of the angle and the rotational direction in which relative rotation occurs between the components.
Description
Technical Field
The present invention relates to a device detection technology, and more particularly, to a method, an apparatus, and a system for detecting relative rotation between components.
Background
In many applications, it is desirable to assemble or connect multiple components. The parts can be influenced by external force in the use process, the parts can often loosen and even fall off, potential dangers can be caused, for example, a plurality of parts are often used in equipment such as railway transportation, ocean transportation, aerospace and the like and are connected for use, if the connecting parts loosen and even fall off, various accidents can be caused, and disastrous results can be caused.
For example, in the process of overhauling a high-speed rail, due to the complex structure of a locomotive, a plurality of key positions are inconvenient for maintenance personnel to operate, for example, a loose positioning line is possibly covered by dust and cannot be seen, or the loose positioning line is inconvenient for the personnel to view in a hidden position, or the personnel in a small space are difficult to view, and the like, so that manual detection is not easy. However, the existing detection method for the relative rotation between the components is not accurate enough, and is complex to operate and inconvenient to use.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a method, apparatus and system for detecting relative rotation between components that overcomes or at least partially addresses the above-identified problems.
In a first aspect, an embodiment of the present invention provides a method for detecting relative rotation between components, including:
the label detects the on-off of at least one detection circuit connected with the label;
determining that relative rotation between the components has occurred when the tag detects that the at least one detection circuit is open;
the detection circuit and the tag form at least one closed loop that is opened upon relative rotation between the components.
In one embodiment, the number of detection circuits is at least two; the detection circuit is arranged on a rotation plane of the relative rotation between the components according to a preset angle;
determining that relative rotation between the components has occurred when the tag detects that the at least one detection circuit is open, comprising:
when the tag detects that at least 2 of the detection circuits are disconnected, determining corresponding disconnection time;
determining the disconnection sequence of the detection circuits according to the disconnection time of the at least 2 detection circuits;
and determining the angle and direction of relative rotation between the components according to the disconnection sequence, at least 2 detection circuits and the distribution positions on the rotation plane.
In one embodiment, after determining the angle and direction of relative rotation between the components, the method further comprises:
and determining and recording the displacement between the components in the direction vertical to the rotation plane according to the angle of the relative rotation between the components.
In one embodiment, the determining of the relative rotation angle between the components by means of a threaded connection, and the determining of the displacement between the components in the direction perpendicular to the plane of rotation, is calculated using the following formula:
L＝m*λ*(n/2π)；
wherein L is the displacement between the components in the direction perpendicular to the plane of rotation, m is the number of thread starts, λ is the pitch, and n is the angle of rotation.
In a second aspect, an embodiment of the present invention provides an apparatus for detecting relative rotation between components, including:
a tag and at least one detection circuit connected to the tag;
the tag is used for detecting that the at least one detection circuit is disconnected and determining that relative rotation between the components occurs;
the detection circuit and the tag form at least one closed loop such that the closed loop is opened when relative rotation occurs between the components.
In one embodiment, the detection circuit includes: at least two metal detection lines and a conductive seat;
One end of each of the at least two metal detection lines is connected with the tag, and the other end of each of the at least two metal detection lines is connected with the conductive seat;
the conductive seat is arranged on a first component, and the label is arranged on a second component, so that when the first component and the second component rotate relatively, the at least one metal detection line is disconnected.
In one embodiment, an apparatus for detecting relative rotation between components, comprises: a plurality of detection circuits;
the plurality of detection circuits are arranged at a predetermined angle on a rotation plane of the relative rotation between the first member and the second member.
In one embodiment, an apparatus for detecting relative rotation between components further comprises: a cutting member;
the detection circuit comprises the at least one metal detection line, and the at least one metal detection line is connected with the label;
the label and the at least one metal detection wire are adapted to be disposed on the second member, and the cutting member is adapted to be disposed on the first member and to traverse the closed loop such that upon relative rotation of the first and second members, the at least one metal detection wire is broken by the cutting member.
In one embodiment, the number of detection circuits is at least two; the detection circuit is arranged on a rotation plane of the relative rotation between the components according to a preset angle;
the tag is used for determining corresponding disconnection time when at least 2 detection circuits are disconnected; determining the disconnection sequence of the detection circuits according to the disconnection time of the at least 2 detection circuits; and determining the angle and direction of relative rotation between the components according to the disconnection sequence, at least 2 detection circuits and the distribution positions on the rotation plane.
In one embodiment, the first member and the second member are connected by a screw thread, and the tag is configured to calculate the displacement between the first member and the second member in a direction perpendicular to the plane of rotation, based on the angle of relative rotation between the first member and the second member, using the following formula:
L＝m*λ*(n/2π)；
wherein L is the displacement between the components in the direction perpendicular to the rotation plane, m is the number of thread starts, and n is the rotation angle.
In a third aspect, an embodiment of the present invention provides a system for detecting relative rotation between components, including:
Two parts which can rotate relatively, and a device for detecting the relative rotation between the parts.
In a fourth aspect, an embodiment of the present invention provides a system for detecting relative rotation between components, including:
two relatively rotatable members, a device for detecting relative rotation between the members, and
and the label data acquisition equipment is used for acquiring information recorded by the label in the device for detecting the relative rotation between the parts.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the embodiment of the invention provides a method, a device and a system for detecting relative rotation between components, which are used for detecting the rotation between the components, and particularly can automatically identify the relative rotation between the components when the components are positioned in a hidden space or the components are small in size and the rotation between the components is not easy to detect manually. Moreover, even a slight relative rotation between the members can be easily detected, and therefore the sensitivity of detecting the relative rotation between the members is greatly improved. After detecting that the parts rotate, detection personnel can rapidly and conveniently acquire information of relative rotation between the parts through fixed or handheld mobile tag data acquisition equipment so as to help the detection personnel judge the degree of rotation between the parts and decide whether to replace the parts.
In addition, the invention can not only detect the relative rotation between the components, but also detect the more accurate range and the rotation direction of the rotation angle, thereby providing more detection information for detection personnel.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method of detecting relative rotation between components in an embodiment of the invention;
FIG. 2 is a flow chart of an embodiment of the present invention for determining relative rotation between components when a tag detects an open at least one detection circuit;
FIG. 3 is a schematic diagram of a structure in which 4 detection circuits are disposed on a rotation plane of relative rotation between components according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a detection circuit of an apparatus for detecting relative rotation between components according to an embodiment of the present invention, which includes two metal detection wires and a conductive pad;
FIG. 5A is a schematic diagram of an embodiment of the present invention in which one of the sensing circuits is open and rotation occurs between the components;
FIG. 5B is a schematic diagram of an embodiment of the present invention in which two detection circuits are disconnected and 30-degree rotation occurs between the components;
FIG. 5C is a schematic diagram of a structure in which three detection circuits are turned off and 60 degrees of rotation occurs between the components according to an embodiment of the present invention;
FIG. 5D is a schematic diagram of an embodiment of the present invention in which four detection circuits are open and 90 degree rotation occurs between the components;
FIG. 6A is a schematic view of an apparatus for detecting relative rotation between components including a cutting member according to an embodiment of the present invention;
FIG. 6B is a top view of an apparatus for detecting relative rotation between components including a cutting member and 12 detection circuit structures according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for detecting relative rotation between a bolt and a nut according to an embodiment of the present invention.
Wherein the content of the first and second substances,
1-number 1 detection circuit
2-number 2 detection circuit
3-number 3 detection circuit
4-number 4 detection circuit
10-first part
20-second part
30-chip
40-metal detection line
50-cutting member
60-label
70-conductive seat
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to solve the problems of the prior art that the detection method for the relative rotation between the components is not accurate enough, the operation is complex, and the use is inconvenient, the invention will be described with several specific embodiments.
Example one
The first embodiment of the present invention provides a method for detecting relative rotation between components, which is shown in fig. 1 and includes the following steps:
s11, detecting the on-off of at least one detection circuit connected with the label by the label;
the tag in this step includes a chip and a tag antenna. The chip is used for detecting and recording the on-off state of a detection circuit connected with the label. The tag antenna is used for carrying out wireless data exchange with external tag data acquisition equipment so as to transmit the on-off state of the detection circuit stored in the chip to the tag data acquisition equipment. The tag may be an electronic tag using any one of radio frequency technology, and/or near field communication technology. The invention is not limited in any way as to the type of tag.
The label of the invention adopts RFID (radio Frequency identification) label. The RFID is a non-contact automatic identification technology, a target object is identified and related data is obtained through a radio frequency signal, manual intervention is not needed in identification work, and as a wireless version of a bar code, the RFID tag has the advantages of water resistance, magnetism prevention, high temperature resistance, long service life, large reading distance, capability of encrypting data on the tag, larger storage data capacity, free change of stored information and the like which are not possessed by the bar code. The information of the detection circuit stored in the tag can be acquired through the tag data acquisition equipment, and the data is transmitted to the server side.
S12, determining that relative rotation between the components occurs when the tag detects that the at least one detection circuit is open;
when the relative rotation between the components occurs, causing at least one detection circuit to be disconnected, the tag may detect the disconnection of the detection circuit and record disconnection information of the detection circuit, such as the number of the disconnected circuit, disconnection time, etc., into the chip of the tag in step S11.
In the method of this embodiment, the detection circuit includes at least one metal detection line that is opened when relative rotation occurs between the members and forms at least one closed loop with the tag. When relative rotation occurs between the components, the metal detection line will open, resulting in the opening of the closed circuit, whereby the tag can detect that the detection circuit is open.
In this embodiment, when the components rotate relatively, the metal detection line is disconnected, and the tag can easily detect that the closed loop connected to the metal detection line is disconnected, so that the tag can detect that the components rotate relatively and record the on-off information of the detection circuit in the chip. Particularly, when the position of the part is inconvenient for a maintenance worker to operate, for example, a loose positioning line is possibly covered by dust and cannot be seen, or the loose positioning line is inconvenient for the maintenance worker to view in a hidden position, or the loose positioning line is difficult to view by the maintenance worker in a small space, and the like, the method can automatically identify whether the parts rotate relatively or not when the parts are not easy to manually detect. The detection method is easy to realize and simple to use, and can quickly and effectively judge the relative rotation of the components.
Example two
In the second embodiment, the number of the detection circuits is at least 2, and the detection circuits are arranged according to a preset angle on a rotation plane of the relative rotation between the components, as shown in fig. 3 and fig. 6B, the detection circuits are uniformly distributed on the rotation plane of the relative rotation between the components, although a non-uniform distribution mode may also be adopted, which is not limited in the embodiment of the present invention.
In the above embodiment, in step S12, when the tag detects that at least one of the detection circuits is open, determining that relative rotation occurs between the components may be implemented by:
s21, when the label detects that at least 2 detection circuits are disconnected, determining corresponding disconnection time;
in this step, when the tag detects that at least 2 detection circuits are disconnected, the time corresponding to the disconnection of the detection circuits is recorded in the chip of the tag.
S22, determining the disconnection sequence of the detection circuits according to the disconnection time of the at least 2 detection circuits;
from the detection circuit off time of step S22, and from the number of the detection circuit, the order in which the detection circuits are off can be determined.
For example, as shown in fig. 3, 4 detection circuits composed of 4 tags are provided on a rotation plane of relative rotation between the components, and the 4 detection circuits are arranged in parallel on a rotation plane of 360 degrees of relative rotation between the components in order of clockwise direction.
The information of the detection circuit recorded by the chip in the tag is shown in table 1:
| detecting circuit off-time | Detection circuit numbering | Disconnection sequence |
| 2020.1.1 19:00 | 1 | 1 |
| 2020.1.2 10:00 | 2 | 2 |
TABLE 1
Or the information of the detection circuit recorded in the chip is shown in table 2:
| Detecting circuit off-time | Detection circuit numbering | Disconnection sequence |
| 2020.1.1 19:00 | 4 | 1 |
| 2020.1.2 10:00 | 3 | 2 |
TABLE 2
And S23, determining the angle and direction of relative rotation between the components according to the disconnection sequence, at least 2 detection circuits and the distribution positions on the rotation plane.
Based on the fact that the detection circuit of the chip recording in step S22 is disconnected and the position of the circuit distribution as shown in fig. 3, the angle and direction of the relative rotation of the components can be determined, and the determined angle and direction of rotation can be recorded in the chip.
For example, according to the information in table 1, it can be seen that the route No. 1 is disconnected first, and the route No. 2 is disconnected later, so that it can be determined that the rotation direction between the components is clockwise, i.e., it is determined that 19: 00 rotate between 0 and 90 degrees clockwise. 10 between parts at 2020.1.2: 00 again, 90-180 degrees of rotation in the clockwise direction occurs. The tag can determine the angle range and direction of rotation between the components, and can add information recording the angle and direction of rotation between the components to the chip, as shown in table 3:
| detecting circuit off-time | Detection circuit numbering | Disconnection sequence | Rotation angle (degree) | Direction of rotation |
| 2020.1.1 19:00 | 1 | 1 | 0～90 | Clockwise |
| 2020.1.2 10:00 | 2 | 2 | 0～180 | Clockwise |
TABLE 3
From the information in table 2, it can be seen that the No. 4 detection route is disconnected first and the No. 3 detection route is disconnected later, and therefore, it can be determined that the inter-component rotation direction is counterclockwise, that is, it is determined that the inter-component rotation direction is 19: 00 have rotated between 0 and 90 degrees in a counter clockwise direction. 10 between parts at 2020.1.2: 00 again, 90-180 degrees of rotation in the counter clockwise direction occurs. The tag can determine the angle range and direction of rotation between the components, and the chip can record the information of the angle and direction of rotation between the components, as shown in table 4:
| detecting circuit off-time | Detection circuit numbering | Disconnection sequence | Rotation angle (degree) | Direction of rotation |
| 2020.1.1 19:00 | 4 | 1 | 0～90 | Counter clockwise |
| 2020.1.2 10:00 | 3 | 2 | 0～180 | Counter clockwise |
TABLE 4
The detection circuits in the above example are provided in 4 numbers and are evenly distributed on the rotation plane of the relative rotation between the components. Therefore, the detected rotation angle between the members is within one angular range. Therefore, in order to improve the accuracy of detecting the rotation angle of the member, more detection circuits may be arranged, and a more accurate range of the rotation angle is detected according to the order and position of the detection circuits that are turned off.
For another example, referring to fig. 6B, 12 detection circuits are disposed on a rotation plane of relative rotation between the components, and the 12 detection circuits are disposed in parallel on a rotation plane of 360 degrees of relative rotation between the components in order of clockwise direction. The plane of rotation was divided into 12 portions of 30 degrees each. When detecting that the No. 1 detection circuit is disconnected, the angle range of relative rotation between the components can be determined to be between 0 and 30 degrees, when detecting that the No. 2 detection circuit is disconnected, the angle range of relative rotation between the components can be determined to be between 0 and 60 degrees, and the like, and the angle of rotation between the components can be determined more accurately by the embodiment.
The number of chips and the number of detection circuits are not limited in the present invention. The plurality of detection circuits may be formed by a plurality of chips, respectively, or may be formed by one chip. It is conceivable that the rotation angle between the components is determined more accurately as the number of detection circuits increases, and at the same time, the complexity of the circuits increases.
The invention does not limit the arrangement of the detection circuit on the rotation plane of the relative rotation between the components according to the preset angle, and the detection circuit can be evenly distributed or unevenly distributed on the rotation plane of 360 degrees. As long as the detection circuit can be set according to the preset angle.
Further, if the components in this embodiment are connected by a screw, the displacement between the components in the direction perpendicular to the plane of rotation is determined based on the determined angle of relative rotation between the components, and calculated using the following formula:
L＝m*λ*(n/2π)；
wherein L is the displacement between the components in the direction perpendicular to the rotation plane, m is the number of thread starts, λ is the thread pitch, and n is the rotation angle.
In this embodiment, since the determined n is the range of the rotation angle, the displacement distance calculated using the formula is the range of the length. The smaller the range of the determined rotation angle, the smaller the length range interval over which the displacement distance is calculated, i.e. the more precise the length interval of the displacement.
In the present embodiment, the detection circuit is arranged at a predetermined angle on the rotation plane where the relative rotation between the components occurs, and according to the time and the sequence of the disconnection of the detection circuit, not only the relative rotation between the components can be detected, but also a more accurate range and rotation direction of the rotation angle can be detected. Meanwhile, the distance between the components caused by relative rotation can be judged according to the length of displacement between the components in the direction perpendicular to the rotation plane, for example, when the components with certain thicknesses are clamped between the components, the fastening degree between the components can be determined according to the loosening distance between the components, and when the loosening reaches the preset degree, the loosening can be timely detected, so that further information of the detected components can be accurately provided for detection or maintenance personnel.
EXAMPLE III
Based on the same inventive concept, a third embodiment of the present invention provides a device for detecting relative rotation between components, including:
a tag and at least one detection circuit connected to the tag; the tag is used for detecting that at least one detection circuit is disconnected, and can determine that relative rotation occurs between the components;
the detection circuit and the tag form at least one closed loop such that the closed loop is opened when relative rotation occurs between the components.
In a specific implementation, the structure of the device for detecting relative rotation between components is divided into two cases:
the first method is as follows: fig. 4 is a schematic view showing a structure of an apparatus for detecting relative rotation between members, in which a detection circuit includes: at least two metal detecting wires 40 and conductive pads 70.
At least two metal detection wires 40 are connected to the tag 60 at one end and to the conductive pad 70 at the other end, thereby forming a closed circuit loop.
The conductive socket 70 may be fixed to the first member 10 by means of bonding, welding, riveting, or screwing, and rotates with the rotation of the first member 10. The embodiment of the present invention does not limit the connection manner of the conductive socket 70 and the first member 10.
The label 60 may be attached to the second member 20 by a socket, adhesive or welding connection, so that it can rotate with the rotation of the second member 20. Embodiments of the present invention do not limit the manner in which the tag 60 is attached to the second member 20. Since the components may be subjected to harsh environments and it is desirable to protect the tag 60, in some embodiments, a protective sleeve may be added on the exterior of the tag 60 and disposed on the second component 20 in various ways to prolong the service life and maintain the stability thereof.
When the first member 10 and the second member 20 are initially fastened, the metal detecting wire 40 is kept in a connected state, and thus the detecting circuit is kept in an energized state. When the first member 10 and the second member 20 are relatively rotated by an external force, at least one of the metal detection lines 40 is disconnected to break the detection circuit, and the tag 60 detects the disconnection of the detection circuit, thereby determining that the relative rotation between the first member 10 and the second member 20 has occurred.
Further, the present embodiment may also arrange the plurality of detection circuits at a predetermined angle on a rotation plane of the relative rotation between the first member 10 and the second member 20.
The plurality of detection circuits are arranged on a rotation plane in which the first part 10 and the second part 20 rotate relatively according to a preset angle, so that the relative rotation of the first part 10 and the second part 20 can be detected, and the rotation angle can be judged. As shown in fig. 5A, when one of the detection circuits is opened, that is, as indicated by circles in fig. 5A, the first member 10 and the second member 20 are detected to be rotated by 0 to 30 degrees. As shown in fig. 5B, when the two detection circuits are opened, i.e., as indicated by circles in fig. 5B, the first member 10 and the second member 20 are rotated 30 to 60 degrees. As shown in fig. 5C, when the three detection circuits are opened, that is, as indicated by circles in fig. 5C, the first member 10 and the second member 20 are rotated by 60 to 90 degrees. As shown in fig. 5D, when the four detection circuits are opened, i.e., as indicated by circles in fig. 5D, the first member 10 and the second member 20 are rotated by 90 to 120 degrees.
Furthermore, the use of a plurality of detection lines provides a higher sensitivity of detection than the use of only one detection line. When a plurality of sensing circuits are arranged at a predetermined angle on a rotation plane in which the first and second units 10 and 20 are relatively rotated, an external force is generated at any angle of the rotation plane to cause the first and second units 10 and 20 to be relatively rotated, and the sensing circuit nearest thereto is disconnected. Therefore, by arranging a plurality of detection circuits on a rotation plane of the relative rotation between the first member 10 and the second member 20 at a predetermined angle, the detection sensitivity is higher than that of one detection line provided only at a fixed position.
In this embodiment, when the metal detection line connected between the first unit 10 and the second unit 20 is disconnected, the tag can immediately find that the detection circuit is disconnected, thereby determining that the rotation has occurred between the first unit 10 and the second unit 20 and determining the rotation angle. The device that takes place relative rotation between the detection part that this embodiment provided, easy operation, convenient to use, the testing result is quick effective.
The second method comprises the following steps: the difference from the first mode is that the metal detecting wire 40 is not disposed between the first member 10 and the second member 20, but is located on the second member 20, and a cutting member 50 is added to the first member 10 for cutting the metal detecting wire 40. The cross-sectional view of the device is shown in fig. 6A, the device comprising:
a detection circuit including at least one metal detection line 40 connected to the tag 60;
the label 60 and the at least one metal detecting line 40 are for being disposed on the second member 20;
and a cutting means 50 for being disposed on the first block 10 and passing through the closed circuit, so that the at least one metal detecting wire 40 is cut by the cutting means 50 when the first block 10 and the second block 20 are relatively rotated.
The cutting member 50 is mounted on the first member 10 in a variety of ways including, but not limited to, adhesive, welding, riveting, screwing, etc., so as to be rotatable with rotation of the first member 10.
In a similar manner, the label 60 may be fixedly disposed on the second member 20 in a variety of ways, such as a socket, adhesive, or welded connection, and may rotate with the rotation of the second member 20.
When the first member 10 and the second member 20 are initially fastened, the metal detecting wire 40 is kept in a connected state, and thus the detecting circuit is kept in an energized state. At the same time, the cutting member 50 passes through the closed circuit, being located in the middle of the gap of the closed circuit. When the first member 10 and the second member 20 are relatively rotated by an external force, the metal detecting wire 40 and the cutting member 50 are relatively displaced, the metal detecting wire 40 is cut by the cutting member 50, the detection circuit is broken, and the tag 60 detects the disconnection of the detection circuit, thereby determining that the relative rotation between the first member 10 and the second member 20 is generated.
Further, the present embodiment may also arrange the plurality of detection circuits at a predetermined angle on a rotation plane of the relative rotation between the first member 10 and the second member 20.
For example, referring to fig. 6B, 12 detection circuits are provided on a rotation plane of relative rotation between the components, and the 12 detection circuits are arranged in parallel on a rotation plane of 360 degrees of relative rotation between the components in order of clockwise direction. The plane of rotation was divided into 12 portions of 30 degrees each. When detecting that the No. 1 detection circuit is disconnected, the angle range of relative rotation between the components can be determined to be between 0 and 30 degrees, when detecting that the No. 2 detection circuit is disconnected, the angle range of relative rotation between the components can be determined to be between 0 and 60 degrees, and the like, and the angle of rotation between the components can be determined more accurately by the embodiment.
The plurality of detection circuits are arranged on a rotation plane of the relative rotation between the first member 10 and the second member 20 at a predetermined angle. When the first unit 10 and the second unit 20 are relatively rotated by the external force, the relative rotation of the first unit 10 and the second unit 20 can be detected, and the direction of the rotation and the angular range of the rotation can be determined according to the sequence in which the plurality of detection circuits are sequentially disconnected by the cutting member 50. For a specific determination method, reference may be made to the specific steps in embodiment two, which are not described herein again.
The embodiment arranges the detection circuit on the rotation plane in which the relative rotation occurs between the components according to the preset angle, and can conveniently and quickly determine the range and the rotation direction of the angle in which the rotation occurs between the components according to the time and the sequence of the disconnection of the detection circuit. It is possible to provide the inspecting person with more accurate information on the relative rotation between the inspecting parts.
Further, when the first member 10 and the second member 20 are screwed in this embodiment, the displacement of the first member 10 and the second member 20 in the direction perpendicular to the plane of rotation can be determined based on the angle of relative rotation of the first member 10 and the second member 20 determined in the above embodiment. For a specific method and formula for calculating the displacement, reference may be made to embodiment two, which is not described herein again.
Example four
The present embodiment provides a system for detecting relative rotation between components, comprising:
two parts which can rotate relatively, and the device for detecting the relative rotation between the parts of the embodiment.
The device for detecting relative rotation between two members is fixedly arranged on the two members capable of relative rotation, and rotates along with the relative rotation of the two members to detect, so that the device can detect the relative rotation between the two members.
In one embodiment, two components can be connected by a screw, such as a bolt and nut, as shown in fig. 7, and the device for detecting relative rotation between the components comprises:
the conductive base 70, tag 60 are enclosed within a protective shell and tag housing 80.
The label housing 80 has a hexagonal prism shaped cavity therein for facilitating the connection with the nut, and the bolt is fixedly connected with the conductive base 70. When the bolt and the nut rotate relatively, the tag 60 can detect the disconnection of the detection circuit, thereby determining that the bolt and the nut rotate relatively.
In one embodiment, a system for detecting relative rotation between components, comprises: two parts which can rotate relatively, the device for detecting the relative rotation between the parts of the embodiment, and the label data acquisition equipment, which is used for acquiring the information recorded by the label in the device for detecting the relative rotation between the parts.
The tag data acquisition device may be a fixed data acquisition device through which the part to be detected moves to perform information acquisition of relative rotation of the part, or the tag data acquisition device may be a mobile handheld type in which a detection person can hold the tag data acquisition device to acquire information of relative rotation of the part to be detected.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, apparatus or system. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method of detecting relative rotation between components, comprising:
the label detects the on-off of at least one detection circuit connected with the label;
determining that relative rotation between the components has occurred when the tag detects that the at least one detection circuit is open;
the detection circuit and the tag form at least one closed loop that is opened upon relative rotation between the components.
2. The method of claim 1, wherein the detection circuits are at least two; the detection circuit is arranged on a rotation plane of the relative rotation between the components according to a preset angle;
determining that relative rotation between the components has occurred when the tag detects that the at least one detection circuit is open, comprising:
when the tag detects that at least 2 of the detection circuits are disconnected, determining corresponding disconnection time;
determining the disconnection sequence of the detection circuits according to the disconnection time of the at least 2 detection circuits;
and determining the angle and direction of relative rotation between the components according to the disconnection sequence, at least 2 detection circuits and the distribution positions on the rotation plane.
3. The method of claim 2, wherein after determining the angle and direction of relative rotation between the components, further comprising:
and determining and recording the displacement between the components in the direction vertical to the rotation plane according to the angle of the relative rotation between the components.
4. A method according to claim 3, wherein the determination of the relative rotational angle between the components by means of a threaded connection, and the determination of the displacement between the components in a direction perpendicular to the plane of rotation is based on the angle of relative rotation between the components, is calculated using the following formula:
L＝m*λ*(n/2π)；
Wherein L is the displacement between the components in the direction perpendicular to the plane of rotation, m is the number of thread starts, λ is the pitch, and n is the angle of rotation.
5. An apparatus for detecting relative rotation between components, comprising:
a tag and at least one detection circuit connected to the tag;
the tag is used for detecting that the at least one detection circuit is disconnected and determining that relative rotation between the components occurs;
the detection circuit and the tag form at least one closed loop such that the closed loop is opened when relative rotation occurs between the components.
6. The apparatus of claim 5, the detection circuit comprising: at least two metal detection lines and a conductive seat;
one end of each of the at least two metal detection lines is connected with the tag, and the other end of each of the at least two metal detection lines is connected with the conductive seat;
the conductive seat is arranged on a first component, and the label is arranged on a second component, so that when the first component and the second component rotate relatively, the at least one metal detection line is disconnected.
7. The apparatus of claim 6, comprising: a plurality of detection circuits;
The plurality of detection circuits are arranged at a predetermined angle on a rotation plane of the relative rotation between the first member and the second member.
8. The apparatus of claim 5, further comprising: a cutting member;
the detection circuit comprises the at least one metal detection line, and the at least one metal detection line is connected with the label;
the label and the at least one metal detection wire are adapted to be disposed on the second member, and the cutting member is adapted to be disposed on the first member and to traverse the closed loop such that upon relative rotation of the first and second members, the at least one metal detection wire is broken by the cutting member.
9. The apparatus of claim 8, wherein the detection circuits are at least two; the detection circuit is arranged on a rotation plane of the relative rotation between the components according to a preset angle;
the tag is used for determining corresponding disconnection time when at least 2 detection circuits are disconnected; determining the disconnection sequence of the detection circuits according to the disconnection time of the at least 2 detection circuits; and determining the angle and direction of relative rotation between the components according to the disconnection sequence, at least 2 detection circuits and the distribution positions on the rotation plane.
10. The device of claim 9, wherein the first member and the second member are threadably coupled, and wherein the tag is configured to calculate the displacement between the first member and the second member in a direction perpendicular to the plane of rotation based on the angle of relative rotation between the first member and the second member using the following equation:
L＝m*λ*(n/2π)；
wherein L is the displacement between the components in the direction perpendicular to the rotation plane, m is the number of thread starts, and n is the rotation angle.
11. A system for detecting relative rotation between components, comprising:
two parts which are relatively rotatable, and a device for detecting relative rotation between the parts as claimed in any one of claims 5 to 10.
12. A system for detecting relative rotation between components, comprising:
two relatively rotatable members, an apparatus for detecting relative rotation between members as claimed in any one of claims 5 to 10, and
and the label data acquisition equipment is used for acquiring information recorded by the label in the device for detecting the relative rotation between the parts.
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